Because no sensible discussion is possible. It has never been, and frankly, I'm tired of being personally insulted just for the crime of presenting my own views on WS. Some of so-called "anti-WS" people are not interested in dialogue (and vice versa) and don't listen to those who disagree, so what's the point?
Also, I don't recall anyone who ever said florist "should not" be WS-free, as you claim. That's not true. If you disagree, perhaps you care to point to even one such post where someone said "there are million reasons we should not be WS free"?
I do recall that some of us, including myself, opined that the decision to remain with WS or stay out of it is something that each individual florist should make, based on his/her particular circumstances. We don't believe that there is a universal rule that says "Thou shall not be a WS member."
I also recall that, under certain conditions, incoming orders can be profitable. There are many threads on this topic (profitability of wire-ins), so I won't reapeat it.